Carburetor



June 24, 1930. J. w. WHITE 1,766,158

CARBURETOR Filed June 6, 1924 Jy/v MAL/AM W 75 line 33 of Fig. 1; and

ratente a am 24. 1930 JOHN WEIITE, OF BUFFALO, NEW

CARBURETQR Application filed June a, 1924. Serial in. 718,247.

This invention relates to an improvement in a carburetor and has for its primary object to insure easy starting of a hydrocarbon engine regardless of weather conditions.

Another object of this invention is to provide in a carburetor a passage open at all times from the space above the gasoline in the float tank to the intake manifold wherep by the gas given off from the fuel can rise and thus insure an appreciable amount of fuel in the manifold at all times'so ithat', as

soon as the engine is started, an explosion be drawn through the intake '24 and the in one of the cylinders will result. I

A further object of this invention is to provide in a carburetor means for producing.

suction in the fuel line when the float'tank of the carburetor is empty and thus drawing the fuel into the engine 0 linders.

Other objects of this nvention will appear from the following description taken in connection with the drawing which forms a part thereof, and in which- Fig. 1 is a transverse sectional view ofa' carburetor embodying one form of thisin- 7 vention, the float chamber being empty;

float chamber full; 1-

Fig. 3 is -a sectionalview taken along the Fig. 2 is a transverse sectional view of the Fig. 4 is a view showing the arrangement a of carburetor and fuel pump. d

. Referring to] the drawin numeral 10 is employed to le buretor which may be ofany. type, the Strom the reference berg carburetor here shown being selected for the purpose of illustration only. 1

The carburetor 10 comprises afloat chamber 11 to which fuel is supplied through the inletvalve 12 controlled by the float 13.. The float 13. is carried upon a rod 14 which projects through an opening 15 in the cover 16 and which is closed by a cap 17. Through I the head of the cap 17 is formed an aperture 18, through which air normally enters the float chamber 11. At the bottom of the rod 14 is provided a needle 19 which when the float 13 is in the position shown..in-Fig. 2 enters the inlet valve 12 and rests u on the valve seat 20 thus closing the va ve 12.

When the level of the fuel'in the float chamsignate a car-v mixed air and gasoline will pass throu h the venturi- 25 and the outlet 22 into the intake manifold not shown. Suitable butterfly valves 26 and 27 are provided in the intake 24'and the outlet 22 which are operated in the usual manner. It will be noted that the fuel passes from the float chamber 11 through the passa es.28. By this construction, it obviously ollows that until the engine is in operation no; fuel is drawn from the chamber 11 and that it is necessarybefore the engine can operate under its own power In order to avoid this objection and to make use of the gases which rise from the surface of the fuel, standing in the chamber 11, I have rovided inthe wall 29 which divides the oat chamber 11 from the mixture compartment a passage 30 which enters the float chamber above the level of the fuel and which enters the mixture compartment adjacent the venturi 25., Thus the gases rising from. thefuel pass through the passage 30 and the outlet 22 into "the manifold even though the engine may have been standing idle for a long time so long as there is fuel in the chamber 11.

In the cap 17 is mounted a valve plate 31 which, in the position shownin Fig. 1, closes the aperture 18 and in the position shown in Fig.2, opens 'the aperture. A ring 32 mounted in a groove 33 in the cap acts as a seal for the valve plate 31. The plate is held against the mouth of the aperture. 18 by the 75 to draw some. of,t,he mixture through the I vnturi .25 and outlet 22 into the manifold.

from the fuel in the chamber 11 so that most Y of it escapes through the passage 30'and outlet 22 as' described above. When, however, 'the engine is running and. suction is created in the outlet 22 some air will be drawn through the aperture 18 and across the top of the float chamber with the gases above mentioned through the passage 30 into the manifold. This supplyof fuel will reach the manifold before the mixture from the venturi 25 and thus insures quicker firing than in an engine equipped with a carburetor of the type previously known.-

Moreover, when the float chamber 11 is empty as shown in Fig. l the valve plate 31 seals the aperture and consequently when the engine is turned over the suction created acts "through the valve 12 and draws fuel into the chamber 11. This obviates the necessity previously experienced of filling the float chamber through the opening 15 without in any way interfering with the usual action of the carburetor since as soon as the float chamber is filled to the normal level {the suction will function to draw the gases from the upper portion of the float chamber as pointed out above while the fuel will be drawn through the passages 28 to the nozzle 23 and mixed with the air in the venturi 25.

Instead of providing the opening 15 in the cover 16 it may be provided in the side wall of the float chamberand closed b an apertured cap 17 in the same way w ereby the air drawn through the aperture will pass across thesurface of the fuel.

I claim as new and for which desire protection by Letters Patent is:

The combination with a hydrocarbon en gine, of a carburetor having a mixing chamber and a float chamber, a passage between said chambers above the level of fuel in the float chamber open at all times, a pump for supplying fuel to said carburetor float chamber from a supply at a level below the pump, a valve controlled connection between the pump and the float chamber, a valve therefor,

- a vent for the float chamber, a valve therefor,

and means in said float chamber for ppening said fuel valve, sa1d means also closm sa1d air valve only when said float cham er is empty.

Intestimony whereof I have aflixed my signature. I V

JOHN WILLIAM WHITE.

In' Fig.4 is shown somewhat schematically l a motor cylinder block 40 to the intake manifold 41 of which is'attached the carburetor 10. The carburetor instead of being connected to a vacuum tank or, directly to the fuel tank is connected by a fuel pipe 42 to a fuel pump 43 of the type disclosed in my co-pending application, Serial No. 635,747, filed April 30, 1923 which pump is connected by the fuel pipe 44 .to the tank or other source of fuel supply. When the carburetor 10 is empty as shown in Fig. 1 and the engine is turned over by a starter or crank the suction created'will function through the valve 12 and pipe 42 upon the pump 43 and thence through the pipe 44 and thus draw the fuel directly from the source of supply 45 which is at a level lower than the pump through the pump 43 into the carburetor 10. The system isthus filled by the creation of minus pressure and the pump 43, having been primed, will function in the usual way to feed the fuel intothe carburetor. My tests indicate that the, first fuel from the source of supply enters the carburetor by reason of this minus pressureand by the operation of the pump which acts to continue the feed of the uel.

While one embodiment of invention 

